During an album production I always try to test my sound with as many stereo systems as possible and ask friends if I can test the sound on them. In most cases I hear an expected result, but sometimes I get nasty surprises. One stereo system in particular has always made me worried, which is why I use to call it the "evil stereo system".
This stereo system was one of the main reasons for my prolonged sound crisis which delayed the completion of song 7. The existing basses were blown up there monstrously and the bass drum has merged with the bass line to form a misshapen bass pulp.
Yesterday I tested the sound of song 8 after my sound changes and was thrilled. None of the negative traits could be heard there. The sound is definitely finished for me.